MULTIPLE CHOICE QUESTIONS FOR PRACTICE
CHAPTER:- PLANT GROWTH
1. Leaf abscission, fruit fall, bud dormancy occurs by which phyto hormone ?
a) Auxin c) gibberrellins
b) Cytokinin d) ABA
2. Phytochrome occurs in :
a) Angiosperms c) Cycads
b) Gymnosperms d) Bryophytes
3. Cambium activity is highest in :
a) Spring c) Autumn
b) Winter d) Rains
4. Gibberellin was discovered from :
a) Bryophyte c) Algae
b) Fungus d) Gymnosperm
5. The hormone which controls cell division and cell differentiation is :
a) ABA c) Gibberellin
b) Auxin d) Cytokinin
6. Which of the following induces flowering in short day plants ?
a) Auxins c) Ethylene
b) Gibberellins d) Cytokinin
7. Which of the following light is necessary for the germination of seed?
a) Far-Red light c) Blue light
b) Red light d) Green light
8. In which of the following, the seed germinates while it is still attached with the main plant ?
a) Screwpine c) Coconut
b) Mango d) Rhizophora
9. Avena coleoptile auxin is :
a) IBA c) Indole 2-acetic acid
b) Indole 3-lactic acid
d) Indole 3-acetic acid
10. Cold treatment given to plants, for inducing flowring, is called :
a) Etiolation c) Cryoscopy
b) Vernalization d) All the above
11. Growth in numbers is maximum in the zone of :
a) Cell maturation c) Cell elongation
b) Cell division d) All of these
12. For aritificial ripening of fruits which of the following hormone is used ?
a) IAA c) Zeatin
b) Ethylene d) Gibberellins
13. Hormone involved in phototropism is:
a) IAA c) 2, 4–D
c) Kinetin d) Gibberellin
14. Growth movements in response to light are called :
a) Photolysis c) Phototropism
b) Photoperiodism
d) Photosynthesis
15. Vascular cambium and cork cambium are the examples of :
a) Apical meristem
b) Promeristem
c) Lateral meristem
d) Intercalary meristem
16. A method of breaking dormancy and allowing ample absorption of water is :
a) Stratification c) Vernalisation
b) Scarification d) Devernalization
17. Removal of seed coat in dormant seeds, by mechanical method is called :
a) Separation c) Emasculation
b) Vernalization d) Scarification
18. A plant hormone used for inducing morphogenesis in plant tissue culture is :
a) Ethylene c) Cytokinin
b) Gibberellin d) ABA
19. Richmond–Lang effect is concerned with :
a) Cell elongation
b) Breaking dormancy
c) Delay in senescence
d) Suppression of apical dominance
20. Gibberellin was first extracted from:
a) Gibberella fujikur b) Gelidium
c) Gracelaria d) Aspergillus
21. Phytochromes are :
a) Chemicals regulating flowering
b) Chemicals regulating growth from seed to adulthood
c) Hormones regulating growth from seed to adulthood
d) Regulators synthesized by plants and influencing physiological process.
22. If a plant subjected to continuous red light the :
a) Level of phytochrome decreases
b) Phytochrome will be destroyed
c) Phytochrome synthesis increases
d) Destruction and synthesis of phytochrome remain in equilibrium
23. Gibberellic acid induce flowering :
a) In some gymnospermic plants only
b) In long day plnats under short day conditions
c) In short day plants under long day conditions
d) In day-neutral plants under dark condition
24. A pigment which absorbs red and far-red light is :
a) Phytochrome c) Cytochrome
b) Carotene d) Xanthophyll
25. The response of different organisms to environmental rhythms of light and darkness is called :
a) Vernalization c) Photoperiodism
b) Photoaxis d) Phototropism
26. ABA is involved in :
a) Dromancy of seed
b) Root elongation
c) Shoot elongation
d) Increased cell division
27. The method that renders the seed coat permeable to water so that embryo expansion is not physically retarded is:
a) Vernalization c) Denudation
c) Stratification d) Scarification
28. Hormone required in ripening of fruits is :
a) IAA c) Ethylene
b) Zeatin d) NAA
29. If we remove apical bud in a flowering plant what will happen ?
a) Promotion of lateral branching
b) Early flowering
c) Formation of a new apical bud
d) Adventitous roots formation on the cut site
30. What reason will you assign for coconut milk used in tissue culture:
a) Gibberellins c) Auxins
b)) Cytokinins d) Ethylene
31. Which breaks dormancy of potato tuber?
a) Gibberellin c) ABA
b) IAA d) Zeatin
32. Hormone responsible for senescence is :
a) ABA c) GA c) Auxin d) Cytokinin
33. Which of the following prevents the fall of fruits?
a) GA3 c) Ethylene
b) NAA d) Zeatin
34. Which plant is LDP ?
a) Tobacco c) Mirabilis jalapa
b) Glycine max d) Spinach
35. Proteinaceous pigment which controls the activities concerned with light is :
a) Phytochrome c) Anthocyanin
b) Chlorophyll d) Carotenoids
36. Seed dormancy is due to the :
a) Ethylene c) IAA
b) ABA d) Starch
37. Differentiation of shoots is controlled by :
a) High Gibberellin : Cytokinin ratio
b) High Auxin : Cytokinin ratio
c) High Cytokinin : Auxin ratio
d) High Gibberellin : Auxin ratio
38. Plant deficient to element zinc, show its effect on the biosynthesis of plant growth hormone :
a) ABA c) Cytokinin
b) Auxin d) Ethylene
39. ‘Coconut milk factor’ is :
a) Cytokinin c) A gibberellin
b) An auxin d) ABA
40. Which of the following gas is a growth regulator?
a) Methane c) Acetylene
b) Benzene d) Ethylene
41. The growth of a plant in log phase is:
a) Zero c) Fastest
b) Intermediate d) Slowest
42. Growth curve in plants is :
a) Zig-zag c) Sigmoid
b) Linear d) Tetrahedral
43. The length of the plant can be increased by:
a) Lateral meristem c) Dermatogen
b) Apical meristem d) Periblem
44. Auxanometer is used to measure :
a) Growth c) Respiration
b) Transpiration d) Ascent of sap
45. 2, 4–D is an effective :
a) Weedicide c) Fungicide
b) Wormicide d) Rodenticide
46. Which of the following hormone induces flowering ?
a) Auxin c) Florigen
b) Cytokinin d) Gibberellin
47. Ageing is related to which of the following hormone ?
a) Auxin c) Cytokinin
b) Gibberellin d) ABA
48. Stress harmone is :
a) 2, 4–D c) IAA
b) ABA d) IBA
49. Abscisic acid treatment results in :
a) Root elongation c) Stomatal closure
b) Stem elongation d) Leaf expansion
50. Richmand-Lang effect was studied on the leaves of:
a) Funaria c) Xanthium
b) Cycas d) Riccia
51. Bud dormancy is induced by :
a) ABA c) Ethylene
b) IAA d) GA
52. In plants, auxin synthesis occurs in:
a) Phloem cells b) Xylem cells
c) Root and shoot tips d) Cortex
53. Gibberellin was first discovered by :
a) Johanssen c) Bateson
b) Kurosawa d) Fisher
54. Vivipary is the characteristic feature of :
a) Halophytes c) Hygrophytes
b) Hydrophytes d) Xerophytes
55. ........ is not essential for seed germination:
a) Water c) Light
b) Air d) Temperature
56. Germination takes place when the :
a) Previously dormant embryo is activated
b) Cotyledons emerges above the soil
c) Epicotyl comes above the soil
d) Hypocotyl comes above the soil
57. An enzyme that can stimulate germination of barley seeds is :
a) a–amylase c) Protease
b) Lipase d) Invertase
58. Treatment of seed at low temperature under moist conditions to break its dormancy is called:
a) Scarification c) Impaction
b) Vernalization d) Stratification
59. Identify the group of hormone responsible for breaking seed dormancy :
1. ABA 2.Cytokinin
3. Auxin 4. Gibberellin
a) 1, 3 c) 1, 3, 4
b) 2, 3, 4 d) 1, 2, 4
60. Vivipary is :
a)Seed germination with subterranean cotyledons
b) Seed germination with epiterranean cotyledons
c) Fruit development without pollination
d) Seed germination inside the fruit while attached to the plant
61. During seed germination, seed coat ruptures due to:
a) Differentiation of cotyledons
b) Massive glycolysis in endosperm and cotyledons
c) Massive imbibition of water
d) Sudden increase in cell division
62. Inhibition of seed germination can be done by
a) GA c) ABA
b) IAA d) Cytokinins
63. An example of SDP is :
a) Chrysanthemum c) Sugar beet
b) Cucumber d) Spinach
64. Root and shoot regeneration is controlled by :
a) Auxin-gibberellin
b) Auxin-Cytokinin
c) Cytokinin-ABA
d) Cytokinin-Ethylene
65. Through Foolish seedling disease of rice, the hormone discovered is :
a) IAA c) Gibberellin
b) Ethylene d) Kinetin
66. Identify the short night plant :
a) Tomato c) Cosmos
b) Sugar beet d) Potato
67. Hormone responsible for plant and seed dormancy during drought is :
a) IBA c) ABA
b) NAA d) Zeatin
68. Apical dominance due to :
a) High concentration of gibberellin in apical bud
b) High concentration of auxin in apical bud
c) High concentration of auxin in lateral bud
d) Absence of auxin and gibberellins in apical bud
69. Vernalization process requires :
a) Low temperature
b) Meristematic cells at site
c) Proper protoplasmic hydration
d) Relative length of day and night
70. The ripening of fruits can be hastened by treatment with :
a) GA c) Florigen
b) IAA d) Ethylene gas
71. Bolting is caused by
a) Auxin c) Cytokinine b) Gibberellins d) Ethylene
72. What is the effect on the flowering of a plant if a flash of red light is followed by a flash of far-red light?
a) Flowering is increased
b) Flowering is decreased
c) Flowering is stopped
d) Effect of red flash is reversed
73. Leaf abscission is caused by :
a) ABA c) Auxin
b) Cytokinin d) GA
74. Gibberellins produce :
a) Flowering
b) Production and hydrolysing enzymes in germinating seeds
c) Cell division
d) Hasten leaf senescence
75. Natural auxins are synthesized from:
a) Lysine c) Adenine
b) Tryptophan d) Glycine
77. Flowering in Pineapple can be induced by the application of :
a) ABA c) Kinetin
b) 2,4–D d) Ethylene
78. In horticulture an important root inducing chemical is :
a) 2, 4, 5 –T c) NAA
b) 2, 4–D d) IBA
79. Gibberellin causes :
a) Abscision layer b) Fruit ripening
c) Internodal elongation
d) Cell division
80. Gibberellins are
a) Vitamins c) Pigments
b) Hormones d) Enzymes
81. The two hormones which are required in a specific ratio for differentiation of callus tissue culture are:
a) Auxin and cytokini
b) Auxin and Ethylene
c) Gibberellin and Auxin
d) Ethylene and Gibberellin
82. Natural antitranspirant is:
a) Ethylene b) ABA c) IAA d) GA3
83. Delay of fruit ripening to withstand storage and transportation is achieved by preharvest spray of:
a) Auxin c) Gibberellin
b) Ethylene d) Cytokinin
84. Wound hormone is :
a) Ethylene c) GA
b) ABA d) Both b and c
85. The action of ......causes triple response:
a) IAA c) Ethylene
b) IBA d) 2, 4 –D
86. Application of which hormone increase fruit production in grapes:
a) NAA and IBA c) Ethylene
b) ABA d) Gibberellin
87. In cut potato tubers, an unknown compound present in the vascular tissue of various plants stimulated cell division – This was first reported by :
a) Harberlandt c) Miller
b) Skoog d) Letham
88. Gibberellins promotes the production of .... flower in cucurbita:
a) Female c) Sterile
b) Male d) Bisexual
90. Auxin which is highly efficient in the induction of roots on stem cutting is:
a) IAA c) NAA
b) IBA d) 2, 4–D
91. Auxins are destroyed by:
a) IAA–oxidase enzymes
b) Oxidation in presence of O2
c) Both a and b d) Lipase
93. Which of the following hormone does not occur naturally in plants ?
a) 2, 4–D b) GA
c) 6–furfuryl amino purine
d) IAA
94. Auxin inhibits the growth of :
a) Apical bud
b) Lateral/axillary bud
c) Roots on stem cuttings
d) Parthenocarpy
95. In long day plants flowering is induced by:
a) Auxin c) Cytokinin
b) Gibberellin d) Ethylene
96. In an unilateral illuminated coleoptile tip, the percentage of auxin on the illuminated side is :
a) 27% c) 37%
b) 17 d) 47%
98. The lateral buds are induced to grow when the concentration of :
a) CK is more than auxin
b) CK is less than auxin
c) CK is more thn gibberellin
d) CK is more than ABA
99. ........ is known as Antigibberellin as its acts antagonist to gibberellin.
a) Auxin c) Ethylene
b) ABA d) Cytokinin
100. The flowering responses of plants can be changed by:
a) Photoperiodic treatment
b) Induced mutation
c) Injection of enzymes
d) Somatic hybridization
101. Plants which flower in short photoperiod are called :
a) Short day plants
b) Long day plants
c) Short-long day plants
d) Long-short day plants
102. Cestrum nocturnum is a :
a) Short day plant
b) Long day plant
c) Short-long day plant
d) Long-short day plant
103. Synthesis and action site of florigen is:
a)Root and leaf
b) Leaf and Root
c) Leaf and shoot apex
d) Shoot apex and leaf
104. When a plant produces flowers on exposures to alternating exposure to short light and still shorter dark period, it is :
a) Long day plant
b) Short day plant
c) Long-short day plants
d) Intermediate plants
105. Site of photoinductive perception is:
a) Flowers c) Meristems
b) Leaves d) Buds
106. Phytochrome absorbs ..... wave length maximum in the red region.
a) 600 nm c) 660 nm
b) 630 nm d) 730 nm
107. Devernalization can be done by :
a) Low temperature c) Red light
b) Heat treatment d) Dry air
108. For seed germination, one of following factors is not needed, identify it :
a) CO2 c) Suitable temperature
b) Moisture d) Moist air
109. Xanthium seeds are impermeable to :
a) Water c) Both a and b
b) Gases d) Moisture
111. In woody plants, the bud dormancy is induced by:
a) Day length c) CO2 conc.
b) O2 conc. d) Temperature
112. In growth anabolic processes rate must be than the catabolic processes
a) Less c) Same
b) More d) Less/more
113. Growth period of plant between seed germination to flower formation is called :
a) Reproduction phase
b) Growing period
c) Vegetative phase
d) Growing season
114. It is easy to induce resumption of growth in following stages : 1) Pre-dormancy, 2) Mid-dormancy and 3) Post dormancy
a) 1 and 2 c) 2 and 3
b) 1 and 3 d) 3
115. First step towards the growth of the plant is :
a) Dormancy c) Absorption
b) Germination d) Imbibition
116. Cotyledons in monocot plant is:
a) Thick c) Store reserve food
b) Fleshy d) Thin and papery
117. The portion of embryo axis between first node and plumule is :
a) Hypocotyl c) Radicle
b) Epicotyl d) Cotyledon
118. Spermology is the study of :
a) Seed c) Pollengrains
b) Fruits d) Ovules
119. First visible sign of germination is
a) Emergence of hypocotyl
b) Emergence of Epicotyl
c) Emergence of Radicle
d) Emergence of Plumule
120. The cells which have capacity to divide are:
a) Xylem c) Parenchyma
b) Phloem d) Meristem
121. In Bamboo and grasses, the primary growth takes place by:
a) Apical meristem
b) Intercalary meristem
c) Cork cambium
d) Vascular cambium
122. The meristem which is present from embryonic condition is called :
a) Primary growth
b) Secondary growth
c) Primary meristem
d) Secondary
123. Formative phase is :
a) Phase of cell elongation
b) Phase of cell division
c) Phase of cell maturation
d) Phase of differentation
124. The organs which show limited growth are called:
a) Determinate organs c) Periderm
b) Indeterminate organs d) Phellum
125. Covering of the plumule is :
a) Cotyledon c) Coleorhiza
b) Coleoptile d) Scutellum
126. Types of auxins which are difficult to extract are called :
a) Free auxins c) Bound auxins
b) Anti auxins d) Precursors
127. In lettuce and tobacco seeds ..... acts like a substitute to red light for breaking seed dormancy.
a) Auxins c) ABA
b) Gibberellins d) Cytokinin
128. Climacteric rise is the period where production of ..... hormone is increased by 100 times :
a) IBA c) 2, 4–D
b) NAA d) Ethylene
129. What is necessary for perception of vernalization ?
a) Root b) Leaf
c) Dividing cells d) Stem
130. Vernalization takes place in :
a) Moist seeds b) Dry seeds
c) High temperature
d) Absence of O2
131. Bending of coleoptile tip of Avene stativa towards light is due to :
a) Unequal distribution of auxin
b) Unequal distribution of Florigen
c) Unequal distributiopn of Vernalin
d) Accumulation of gibberellin on shaded side.
132. Pineapple can be made to flower off season by the application of :
a) Zeatin b) Ethylene
c) Low temperature d) Short day
133. The growth rate is highest in :
a) Red light b) White light
c) Green light d) Blue light
134. Pigment taking part in photoreception in flowering is :
a) Cytochrome b) Phytochrome
c) Carotene d) Xanthophyll
135. Wheat is a :
a) LDP b) SDP
c) DNP d) intermediate plant
136. Zeatin has been obtained from :
a) Rice b) Wheat c) Oat d) Maize
137. Cell division is promoted by :
a) Auxins b) CK
c) Gibberlins d) Ethylene
138. Antagonistic to auxins in apical diminance is
a) Cytokinin b) ABA
c) Gibberllins d) Ethylene
139. Cambium helps in :
a) Increase in diameter of stem
b) Increase in length and diameter
c) Increase in lengthd) All of these
140. Epigeal germination is shown by :
a) Castor b) Gram
c) Pea d) Ground nut
141. Auxins are synthesised in :
a) Root b) Apical stem
c) Young Fruits d) Embryo
142. During germination the cotyledons remians in the soil, this type is called:
a) Vivipary b) Epigeal
c) Epicotyl d) Hypogeal
143. Suspension of growth due to external conditions is :
a) Dormancy
b) Innate dormancy
c) Pre dormancy d) Quiescence
144. Germination of seed is promoted by:
a) Green light b) Infra red light
c) Red light d) Blue light
145. All the cytokinins are :
a) Acidic b) Aminopurines
c) Phenol d) Glucosides
146. A plant which needs not less than 10 hours of light to flower shoudl be a:
a) Long day plant
b) Day neutral plant
c) Short day plant d) None of these
147. Agar-Agar is yielded by ;
a) Fungi b) Alga
c) Bacteria d) Lichen
148. A good example of an auxin herbicide is :
a) IAA b) 2, 4–D c) NAA d) IBA
149. Germinating barley seeds are used in the perparation of :
a) Beer b) Wine
c) Lactic acid d) Cheese
150. Seeds which are able to withstand reduction in moisture and temperature are called :
a) Dormant seeds b) Orthodox
c) Viable seeds d) Nonviable seeds
151. The hormone which has negative effect on apical dominance is :
a) Ethylene b) Cytokinin
c) Gibberellin d) Auxin
152. Short night plants are also called as:
a) Long day plants
b) Short day plants
c) Day neutral plants
d) Long night plants
153. In unisexual plants sex can be changed by application of :
a) ABA b) Ethanol
c) Auxin d) Cytokinin
154. In some structural aspects .....resemble the nucleic acid :
a) Gibberellins b) Cytokinis
c) Auxins d) ABA
155. Parthenocarpy can be induced by:
a) Auxin and Cytokinin
b) Auxin and Gibberellin
c) Auxin and Ethylene
d) Auxin and ABA
156. Common characteristics shown by auxin and gibberellin is :
a) Both are responsible for apical diminance
b) Both promote growth through cell elongation
c) Production of male flower
d) Bolting
157. Synthesis of IAA is prevented in the absence of:
a) Mo b) Cu c) Zn d) Mn
158. Dormancy period is absent in the seeds of :
a) Hydrophytes b) Mesophytes
c) Mangrove plants d) Xerophytes
159. Formative phase + Elongation phase + Maturation phase =
a) Growing period
b) Grand period of growth
c) Structural differentiation
d) Physiological differentiation
160. Pomalin is a combination of :
a) Auxin and gibberellin
b) Cytokinin and gibberellin
c) Auxin and
cytokinind) Auxin and ABA
No comments:
Post a Comment